Re: Annoying whitenoise sound coming from snd_hda enabled chipset

Yoshihiro Ota wrote:
> On Tue, 24 Feb 2009 21:57:27 +0200
> Alexander Motin <mav_at_FreeBSD.org> wrote:
>> Yoshihiro Ota wrote:
>>> In my case, with hdac or pcm device, 8-CURRENT fails to boot very requentry.
>>> It fails to prove a device and doesn't proceed farthar than that point.
>>> Now it only boots once in 5 or 10 reboots.
>>>
>>> When it boots, it prints lots of following messages.
>>>
>>> hdac0: HDA Codec #0: Conexant CX20549 (Venice)
>>> hdac0: unable to allocate widgets!
>>> hdac0: unable to allocate widgets!
>>> hdac0: unable to allocate widgets!
>>> hdac0: unable to allocate widgets!
>>> hdac0: unable to allocate widgets!
>>> hdac0: hdac_command_send_internal: TIMEOUT numcmd=1, sent=1, received=0
>>> hdac0: hdac_command_send_internal: TIMEOUT numcmd=1, sent=1, received=0
>>> hdac0: hdac_command_send_internal: TIMEOUT numcmd=1, sent=1, received=0
>>> hdac0: hdac_command_send_internal: TIMEOUT numcmd=1, sent=1, received=0
>>> hdac0: hdac_command_send_internal: TIMEOUT numcmd=1, sent=1, received=0
>>>
>>> I think this started happening about a week ago or so, sometime between
>>> 13 and 16th.
>> The only significant change last time was enabling MSI by default. But I 
>> don't think it should lead to such errors. I have tried even operation 
>> completely without interrupts working and there is not such errors. Can 
>> you send me complete verbose dmesg with the problem and `pciconf -lvc` 
>> output?
>>
>> Also you may try to disable MSI by setting 'hint.hdac.0.msi=0' hint.
> 
> Once I disabled snd_hda_load="YES" in /boot/loader.conf, it comes up
> all times.  However, when I run "kldload snd_hda", the system stops responding,
> i.e. crashes.
> 
> So, now I added 'hint.hdac.0.msi="0"' in the hint; then, system comes up fine.
> I tried "kldload snd_hda" and got the following output.
> System didn't crash after adding the hint so that I added snd_hda_load="YES"
> back to /boot/loader.conf.

I have committed a patch to the CURRENT that should disable MSI for your 
HDA controller by default. Test it please.

-- 
Alexander Motin